1. Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei China
2. Department of Colorectal Surgery, National Cancer Center/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China
3. Department of General Surgery, Chinese Academy of Medical Sciences Peking Union Medical College Hospital Beijing China
4. Department of Gastrointestinal Surgery, West China Hospital Sichuan University Chengdu China
5. Department of Gastrointestinal Surgery, Renji Hospital Shanghai Jiao Tong University School of Medicine Shanghai China
6. Department of Gastric Surgery, Liaoning Cancer Hospital and Institute Cancer Hospital of China Medical University Shenyang China
7. Department of General Surgery The First Affiliated Hospital of Shandong First Medical University Jinan China
8. Department of Digestive Surgery, Xijing Hospital of Digestive Diseases The Fourth Military Medical University Xi'an China
9. Department of Gastrointestinal Surgery, Hubei Cancer Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei China
10. Department of Gastrointestinal Surgery, Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei China
11. Department of Gastrointestinal Surgery, People's Hospital Peking University Beijing China